Fabio needs your help!

This is for my boy Fabio
He is 3 years old and while he was playing with his favorite ball he ran into some mud, slipped and tore his hind left leg ligament. The vet said its important that he has surgery soon since he weighs 140 lbs and all the weight is on his other knee, putting that knee at risk for a tear as well. This was completely unexpected and i just want my boy to get better. Please anything will help! Thank you